The Brit Gun Trade was just that, a Trade. Anyone in the Trade could get any materials or services needed at any level of quality; one got what one paid for. Materials and services could be worked down to a price or up to best work level. No body should be surprised to find an obscure BV3 name on a best work gun or a BV1 name on a rather pedestrian gun. The issue was not capability, rather it was obtaining that all powerful commission, with money behind it, to deliver a best work gun. Some makers/finishers/retailers were better than others at attracting orders for higher quality guns. It is fruitless to try to associate the capability of quality work with particular makers' names.